Spiral oil filter



March 21, 1944. V L -5 2,344,590

SPIRAL OIL FILTER Filed March 13, 1941 [72 z/rzzfar Jame/,5 Z.B7-ee,se

I Patented Mar. 21', 1944 SPIRAL OIL FILTER James'L. Breese, Santa Fe, N. Men, asslgnor to Oil Devices, Santa Fe, N. Mex, a limited partnership of Illinois Application March 1:, 1941, Serial No. mp1s 6 Claims. (or. 210-166) My invention relates to an improvement in fioat valves and has for one purpose the provision of improved filter means. My invention is particularly adaptable to float controls employed for controlling .the flow of liquid fuels to oil burners or the like, but of course may have other uses.

Another purpose s the provision of an improved filter in which a spring may be employed as a filtering member.

Another purpose is the provision of an improved fllter in which a plurality of discs, preferably of a springlike nature, may be employed.

Another purpose is the provision of improved filter means i'or float valves and the like in which the shell of the filter may be adjustably varied, for example in proportion to the size of the orifice through which the filtered liquid is being metered. Another purpose is the provision of an improved fiost chamber and filter means in which a plurality of oil outlets are employed, an adjustable and controllable filter being applied either to one or both.

Other purposes will appear from time to time in the course of the specification and claims.

I illustrate my invention more or less-diagrammatic'ally in the accompanying drawing wherein:

Fig. 1 is a vertical longitudinal section through.

able in a sleeve 8 and controlled for example by.

the lever member -'I of afloat 8, which may be pivoted. as at I, for example on an arm I extending upwardly and outwardly from the sleeve I. II are any suitable oil inlet apertures which it may be desired to form inv the sleeve '8.

N indicates a fuel inlet duct from any suitable source of supp y. It may for example, communicate with a filter housing generally indicated at IS, in which is located a filter tube or it may be mounted on a removable plug ll.

which may for example be screw threaded as at It for engagement with the outwardly extending boss is on the housing l5.

- I illustrate in Fig. 1 two fuel outlet ducts II and ii. In Fig. 1 I illustrate my filter means as applied to only one of these ducts. but it will be realized that if desired the filtering means may be applied to both. An example of the employment of such a double outlet duct structure is the employment of-one outlet II, which is employed for example for full stage combustion and where the valve is therefore on the line side, and filtering means may under such circum= stances not be necessary. In such case the outlet 23 and. compressed between an abutment or ring 24, adjustable on the valve stem 23, and a fixed abutment 25 adjacent to or formed as part of the valve seat structure 2. It will be observed that the valve stem 23 has a valve member 21 conforming generally to the seat 26. If desired, any suitable metering slots or channels 28 may be formed.

Any desirable means for adiustlng the valve may be employed, and it will be understood that valve stem may be rotated' any, suitable automatic controls may be used.

However, since the controls do not of themselvesform part of the present invention. I merely illustrate a manual setting means for the valve, including the screw threaded extension ll of the valve stem, which is screw-threaded in a boss or sleeve 3! of the cover plate I. '32 indicates any suitable manual control knob whereby the It will be understod that, as the valve stem is rotated from closed to open position, the abutment 24 is moved upwardly or from the fixed abutment 25, and the result is that the spring discs 22 tend to separate and to increase the the like It, which may be of cloth, wire, mesh or A thelike. Thisfilter wouldbege'nerally of coarsermeshthanthe belowdescrlbedfilter within the iioat chamber proper. The filter member space therebetween. It will be observed that there is, therefore, a proportional relationship 'Imay,asinl-ig.2,showaseparationbetween the valve stem 28 and the upper or operating per.

stem as far as the control portion or member 30a will permit, this control being operated by any suitable, preferably automatic, means not herein shown.

As to Fig. 3. I illustrate the employment of a coil spring 40 in the place of the multiplicity of spring discs 22. It operates, however, in the same general manner,- namely, to permit an increased opening of the filter in proportion as the valve orifice is also opened.

Either form 01 filter, whether coil spring or spring disc, may be employed with a single outlet passage or with two outlet passages. Also, in each case the filter may be employed with only one of two passages, or with both. Where but a single passage is employed it will be understood that when the valve is closely set, the

' filter, means herein shown will provide a very this valve opening and the filter openings are thus flushed out by the flow of the fuel so that both the valve aperture and the filter are cleaned, ready for the ensuing fine setting. Where two valves and valve passages are employed, I may it desired have a coarser filter for the passage Eli and a liner filter tor the outlet passage 2 i.

It will be realized that, whereas I have described and illustrated a practical and operative device, nevertheless many changes may be made in the size, shape, number and dispositionoi parts without departing from the spirit or my invention. 1 therefore wish my description and seat located in said container below the normal level oi the liquid therein, a movable valve-member, means for moving the valve member toward and away from the valve seat, the valve seat and the valve member defining a valve aperture, 9. spring strainer structure surrounding said valve aperture, and extending below the level of the liquid in the container, means for maintaining said spring strainer structure under compression, and for increasing its compression in unison with Y the movement oi the valve member toward the drawing to be taken as in a broad sense illustrative or diagraatic, rather than as limiting me to my precise showing.

I claim:

1. In combination, a valve seat and a movable valve member, means for. moving the valve member toward the valve seat, the valve seat and the valve member deng a valve aperture, and a spring strainer structure surrounding said valve aperture, urging said valve member away from said valve seat, means for maintaining said spring strainer structure under compression, and for increasing its compression in response to the movement of the valve member toward the valve sea -2. In combination, a valve seat and a movable valve member, means for moving the valve member toward and away from the valve seat, the valve seat and the valve member defining a valve aperture, and a spring strainer structure surrounding said valve aperture, means for maintaining said spring strainer structure under compression and for increasing its compression in unison with the movement'oi the valve member toward the valve seat.

3. In combination, a liquid container, a valve "said valve aperture and extending below the level of the liquid in the container, means for maintaining said spring strainer structure under compression, and for increasing its compression in unison with the movement of the valve member toward and away from the valve seat, including a spring abutment adjacent the valve seat and 'an opposed spring abutment movable with the valve member, the spring strainer structure being normally compressed between said abutments.

5. In combination; a liquid container, a valve seat located in said container below the normal level of the liquid therein, a'movable valve member, means for moving the valve member toward and away from the valve seat, the valve seat and the valve member defining a valve aperture, a spring strainer structure surrounding said valve aperture, and extending below the level of the liquid in the containenmeans for maintaining said spring strainer structure under compression, and for increasing its compression in unison with the movement of the valve member toward and away from the valve seat including a spring abutmerit adjacent the valve seat and an opposed spring abutment movable with the valve member, the spring strainer structure being normally compressed between said abutments, the spring strainer including a coil spring;

ii. In combination, a liquid container, a valve seat iocated in said container below the normal level or the liquid therein, a valve stem and means for moving it along a defined axis toward and away from said valve seat, said stem including a portion adapted to be opposed to said valve seat and to define with said valve seat a valve aperture, a coil spring strainer structure surrounding said valve stem and extending below the level or the liquid, a lower abutment for JAll-IES 1.. BREESE. 

